canihaveurpants
Well-Known Member
Two days ago I upgraded to a Johnson A419 digital temperature controller from their analog model hoping for some more consistent fermentation temps but am so far having issues with big temperature swings. My set up as of now is a 7.2 cu ft. Frigidaire chest freezer housing a single 6 gallon Better Boy carboy that had already been fermenting for a week and a half with the analog controller. So even with vigorous fermentation over I am still seeing swings on the temperature display of my Johnson control.
I have the settings as 65 degrees hold, 2 degree variance, and 12 minute cycles. I have been watching and see the temp drop to 60 (while the compressor gets super hot) and then climb all the way back up to 65 within a short period of time (an hour to two) starting the process all over again. Currently I have the probe touching the outside of the carboy covered with bubble wrap. I had previously tried dangling the probe in the air but was having similarly bad results. Anyone have a suggestion? I've read about a million forums on this topic but can't seem to adjust my setup to keep my temp consistent!!
I have the settings as 65 degrees hold, 2 degree variance, and 12 minute cycles. I have been watching and see the temp drop to 60 (while the compressor gets super hot) and then climb all the way back up to 65 within a short period of time (an hour to two) starting the process all over again. Currently I have the probe touching the outside of the carboy covered with bubble wrap. I had previously tried dangling the probe in the air but was having similarly bad results. Anyone have a suggestion? I've read about a million forums on this topic but can't seem to adjust my setup to keep my temp consistent!!